Public bug reported: I upgraded my Ubuntu 20.04 system with a new graphics card a few days ago. Everything seems fine when running the system normally, however whenever I suspend the machine and then wake it back up, severe problems occur. The first time, the machine froze completely. Switching to a different TTY didn't work anymore and the keyboard LEDs didn't respond to caps and num lock anymore, so I had to force shutdown. The second time, it came back OK but the screen has been flickering heavily since. Restarting Gnome and unplugging and plugging monitors back in hasn't helped.
Relevant specs: CPU: AMD® Ryzen 9 3900x 12-core processor × 24 GPU: AMD® Radeon rx 5600 xt (MSI RADEON RX 5600 XT MECH OC) Monitors: 1x Acer running at 3840x2160 60Hz, 2x Medion (showing up as "Messeltronik Dresden GmbH") both running at 1920x1080 60Hz. Gnome: 3.36.2 X11 Apt doesn't report any updates. The flickering is most pronounced on the Acer. On the Medions, it seems to only happen when something changes on the screen. I have tried to capture this on video: https://youtu.be/HWT1J76-x94 This bug seem quite similar to this one (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1874588). I can also stop the flickering by switching the Acer to 1080p but when switching back to 4k, the problem reappears. I hope that ubuntu-bug has included all the necessary details. Let me know if you need anything else. Thank you very much for your help! ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-39.43-generic 5.4.41 Uname: Linux 5.4.0-39-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.3 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: GNOME Date: Sat Jun 27 10:44:32 2020 DistUpgraded: 2020-04-30 20:17:33,403 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py' DistroCodename: focal DistroVariant: ubuntu DkmsStatus: nvidia, 440.100, 5.4.0-37-generic, x86_64: installed nvidia, 440.100, 5.4.0-39-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] [1002:731f] (rev ca) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. [MSI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] [1462:381e] InstallationDate: Installed on 2019-03-26 (458 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-39-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to focal on 2020-04-30 (57 days ago) dmi.bios.date: 04/08/2020 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P2.60 dmi.board.name: X570 Extreme4 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.60:bd04/08/2020:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX570Extreme4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.sku: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.101-2 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2.1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug corruption focal ubuntu ** Attachment added: "Video of the flickering" https://bugs.launchpad.net/bugs/1885363/+attachment/5387645/+files/VID_20200627_104547.mp4 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1885363 Title: Screen flickers after waking up from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1885363/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
